CN215925600U - Temporary counter-pulling system for cable-stayed bridge reinforced concrete composite beam - Google Patents
Temporary counter-pulling system for cable-stayed bridge reinforced concrete composite beam Download PDFInfo
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- CN215925600U CN215925600U CN202121262424.7U CN202121262424U CN215925600U CN 215925600 U CN215925600 U CN 215925600U CN 202121262424 U CN202121262424 U CN 202121262424U CN 215925600 U CN215925600 U CN 215925600U
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Abstract
The utility model belongs to the technical field of bridge installation and construction, and particularly provides a temporary counter-pulling system for a steel-concrete composite beam of a cable-stayed bridge, which comprises a temporary counter-pulling unit, wherein a first composite beam is connected with a second composite beam through the temporary counter-pulling unit; every interim counter-pulling unit includes first steel tooth bank, interim pull rod, bolt and second steel tooth bank, first steel tooth bank bottom passes through bolted connection combination roof beam one, second steel tooth bank passes through bolted connection combination roof beam two, first steel tooth bank passes through interim pull rod connection second steel tooth bank, it is great to have solved the required shaped steel model of current shaped steel welded joint method, there is the potential safety hazard in the work progress, after the combination roof beam installation is taken one's place, the shaped steel is demolishd comparatively difficultly, and direct girder steel welding has the risk to the girder steel damage, neither safe nor economic and scientific problem, it is safe to have a temporary connection, effective and effort is steerable, simple structure has, and easy and simple to handle, the connectivity is strong, the joint force or the connection degree is controllable, and circulated use's characteristics.
Description
Technical Field
The utility model belongs to the technical field of bridge installation and construction, and particularly relates to a temporary counter-pulling system for a cable-stayed bridge steel-concrete composite beam.
Background
The central cable-plane cable-stayed bridge is widely adopted in the construction of a large-span cable-stayed bridge by virtue of the excellent driving comfort and the attractive appearance of the bridge after the central cable-plane cable-stayed bridge is built. When the combined beam of the upper structure of the central cable-stayed bridge is installed, in order to balance the tensile stress generated by the transverse wet joint between the cantilever parts at two sides of the erected beam section when the central cable-stayed bridge is tensioned, a measure for strengthening the connection between the adjacent combined beams needs to be taken, and the stress safety of the combined beams is ensured. The adopted measures are safer and more effective, and are the problems to be researched and solved.
The common connection between the combined beams mostly adopts a form of directly welding the section steel and the adjacent steel beams, and after the combined beams are hoisted in place, the section steel and the adjacent combined beams are welded to reinforce the connection between the combined beams.
The required section steel model of shaped steel welded joint method is great, has the potential safety hazard in the work progress, and after the built-up beam installation was taken one's place, the section steel was demolishd comparatively difficultly, and direct girder steel welding has the risk to the girder steel damage, neither safe nor economic and scientific.
SUMMERY OF THE UTILITY MODEL
The utility model provides a temporary counter-pulling system for a steel-concrete composite beam of a cable-stayed bridge, which aims to solve the problems that in the prior art, a steel type required by a steel welding joint method is large, potential safety hazards exist in the construction process, the steel is difficult to remove after the composite beam is installed in place, and the steel beam is damaged by direct steel beam welding, so that the temporary counter-pulling system is not safe, economical and scientific.
Therefore, the utility model provides a temporary opposite-pulling system for a steel-concrete composite beam of a cable-stayed bridge, which comprises a first composite beam and a second composite beam, wherein the first composite beam and the second composite beam are adjacently arranged in front and at back and comprise temporary opposite-pulling units; the temporary counter-pulling unit comprises a first steel tooth ridge, a temporary pull rod, a bolt and a second steel tooth ridge, the bottom of the first steel tooth ridge is connected with a first combined beam through the bolt, the second steel tooth ridge is connected with a second combined beam through the bolt, and the first steel tooth ridge is connected with the second steel tooth ridge through the temporary pull rod.
The first steel tooth ridge and the second steel tooth ridge are symmetrically distributed along a longitudinal axis between the first combined beam and the second combined beam.
The number of the temporary counter-pulling units is more than 2.
And the first steel tooth sill and the second steel tooth sill are both box-shaped structures.
The box structure includes front bezel, back plate, bottom plate, roof, left board and right board, and front bezel and back plate are from preceding back parallel connection between bottom plate and roof, and the left end of front bezel and the left end of back plate pass through the left board and connect, and the right-hand member of front bezel and the right-hand member of back plate pass through the right board and connect, have all seted up the second preformed hole on the relative position of front bezel and back plate, and the second preformed hole of first steel tooth bank is passed to the one end of interim pull rod, and the second preformed hole of second steel tooth bank is passed to the other end.
The temporary pull rod further comprises a nut, one end of the temporary pull rod is fixedly connected with the first steel tooth ridge through the nut, and the other end of the temporary pull rod is fixedly connected with the second steel tooth ridge through the nut.
The number of the temporary pull rods is multiple.
The first preformed holes are formed in the first combined beam and the second combined beam, the bottom of the first steel tooth ridge is connected with the first preformed holes of the first combined beam through bolts, and the second steel tooth ridge is connected with the first preformed holes of the second combined beam through bolts.
The temporary counter-pulling unit further comprises an embedded steel pipe, the embedded steel pipe is connected into the first reserved hole, and the bolt is sleeved in the embedded steel pipe.
The first preformed hole, the embedded steel pipe and the bolt axis are collinear.
The utility model has the beneficial effects that: according to the temporary opposite-pulling system for the steel-concrete composite beam of the cable-stayed bridge, the first steel tooth sill is connected with the first composite beam through the bolts, the second steel tooth sill is connected with the second composite beam through the bolts, and the temporary connection between the first composite beam and the second composite beam is enhanced by pulling the first steel tooth sill and the second steel tooth sill oppositely along the bridge direction between adjacent beam sections through the temporary pull rod; the device ensures that the temporary connection between the combined beams (the first combined beam and the second combined beam) is safe, effective and controllable in acting force, and has the characteristics of simple structure, simplicity and convenience in operation, strong connectivity, controllable connecting force or connecting degree and recycling.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a structural top view of a temporary counter-pulling system of a cable-stayed bridge steel-concrete composite beam;
FIG. 2 is an enlarged view of I-I of FIG. 1;
fig. 3 is a structural front view of the temporary counter-pulling system of the cable-stayed bridge steel-concrete composite beam.
Description of reference numerals: 1. a first steel tooth ridge; 2. a temporary tie rod; 3. a bolt; 4. a first combined beam; 5. a second combined beam; 6. wet seaming of the construction site; 7. a back plate; 8. pre-burying a steel pipe; 9. a nut; 10. a first preformed hole; 11. a second preformed hole; 12. a front plate; 13. a temporary counter-pulling unit; 14. a stay cable; 15. a second steel tooth ridge; 16. a base plate; 17. a top plate; 18. a longitudinal plate; 19. a left panel; 20. and (4) a right plate.
Detailed Description
Example 1:
as shown in fig. 1-3, a temporary counter-pulling system for a cable-stayed bridge steel-concrete composite beam comprises a first composite beam 4 and a second composite beam 5, wherein the first composite beam 4 and the second composite beam 5 are arranged adjacently in front and at the back and comprise a temporary counter-pulling unit 13, and the first composite beam 4 and the second composite beam 5 are connected through the temporary counter-pulling unit 13; the temporary counter-pulling unit 13 comprises a first steel tooth ridge 1, a temporary pull rod 2, a bolt 3 and a second steel tooth ridge 15, the bottom of the first steel tooth ridge 1 is connected with a first combined beam 4 through the bolt 3, the second steel tooth ridge 15 is connected with a second combined beam 5 through the bolt 3, and the first steel tooth ridge 1 is connected with the second steel tooth ridge 15 through the temporary pull rod 2.
The first steel tooth ridge 1 is connected with the first combined beam 4 through the bolt 3, the second steel tooth ridge 15 is connected with the second combined beam 5 through the bolt 3, the first steel tooth ridge 1 and the second steel tooth ridge 15 are pulled oppositely along the bridge direction between adjacent beam sections through the temporary pull rod 2, and the temporary connection between the first combined beam 4 and the second combined beam 5 is enhanced; the device ensures that the temporary connection between the combined beams (the first combined beam 4 and the second combined beam 5) is safe, effective and controllable in acting force, and has the characteristics of simple structure, simplicity and convenience in operation, strong connectivity, controllable connecting force or connecting degree and recycling.
Example 2:
on the basis of the embodiment 1, the first steel tooth ridge 1 and the second steel tooth ridge 15 are symmetrically distributed along the longitudinal axis between the first combination beam 4 and the second combination beam 5. The temporary connection between the first composite girder 4 and the second composite girder 5 can be enhanced.
Further, the number of the temporary counter-pulling units 13 is 2 or more. More than 2 temporary counter-pulling units 13 reinforce and secure the temporary connection between the first composite beam 4 and the second composite beam 5 by acting on adjacent beam sections.
Further, the first steel tooth sill 1 and the second steel tooth sill 15 are both box-shaped structures. The box-type structure enables the first steel tooth ridge 1 and the second steel tooth ridge 15 to have the technical advantages of uniform stress and strong stability during working, and can be closely contacted with the surfaces of the composite beams (the first composite beam 4 and the second composite beam 5).
Further, the box structure includes front bezel 12, back plate 7, bottom plate 16, roof 17, left side board 19 and right board 20, front bezel 12 and back plate 7 are from preceding back parallel connection between bottom plate 16 and roof 17, the left end of front bezel 12 and the left end of back plate 7 pass through left board 19 to be connected, the right-hand member of front bezel 12 and the right-hand member of back plate 7 pass through right board 20 to be connected, second preformed hole 11 has all been seted up on the relative position of front bezel 12 and back plate 7, the second preformed hole 11 of first steel tooth bank 1 is passed to the one end of interim pull rod 2, the second preformed hole 11 of second steel tooth bank 15 is passed to the other end. The temporary pull rod 2 needs to pass through the second preformed hole 11 when being tensioned. The second preformed hole 11 provides working conditions for the temporary pull rod 2, so that the temporary counter-pull unit 13 can be installed on the spot at the action position, the temporary counter-pull unit 13 can be detachably connected, and the use in turnover is convenient.
Furthermore, the number of the second preformed holes 11 is multiple, the multiple second preformed holes 11 are distributed on the front plate 12 and the rear plate 7 at equal intervals, and the aperture of each second preformed hole 11 is slightly larger than the diameter of the temporary pull rod 2; the temporary connection strength between the composite beams is ensured.
Further, the box-type structure also comprises a plurality of longitudinal plates 18, and the longitudinal plates 18 are connected between the front plate 12 and the rear plate 7 at intervals from left to right; the longitudinal panels 18 ensure that the box-type structure is not prone to deformation during use.
Further, the second preformed holes 11 are distributed at equal intervals among the plurality of longitudinal plates 18; the stress of the structure is balanced.
Further, the middle of the second preformed hole 11 is rectangular, and the upper part and the lower part of the second preformed hole 11 are both semicircular; the second preformed hole in the shape can adjust the height of the pull rod 2 up and down, and the structure is simple.
Further, the width of the bottom plate 16 is larger than that of the top plate 17; the stability of the structure is improved.
Further, the left part and the right part of the bottom plate 16 are connected with the combination beam through a plurality of bolts 3 from front to back in sequence. The strength and stability of the temporary connection are improved.
Further, still include nut 9, the first steel tooth bank 1 of nut 9 fixed connection is passed through to the one end of interim pull rod 2, and the other end of interim pull rod 2 passes through nut 9 fixed connection second steel tooth bank 15. After the first combined beam 4 and the second combined beam 5 are hoisted in place, a construction site wet joint 6 is poured, and after maintenance conditions are met, the temporary pull rod 2 is tensioned before the stay cables 14 of the beam sections are installed; stretching the temporary pull rod 2 to a designed value, solidifying the temporary pull rod beam section by using a nut 9, wherein the nut 9 can ensure stable anchoring at two ends of the temporary pull rod 2 and prevent the temporary pull rod 2 from losing force during stress.
Further, the number of the temporary tie rods 2 is plural. The plurality of temporary tie rods 2 can reinforce the temporary connection between the composite girders.
Furthermore, first preformed holes 10 are formed in the first combined beam 4 and the second combined beam 5, the bottom of the first steel tooth sill 1 is connected with the first preformed holes 10 of the first combined beam 4 through bolts 3, and the second steel tooth sill 15 is connected with the first preformed holes 10 of the second combined beam 5 through bolts 3. The first preformed hole 10 facilitates the bolt 3 to connect the first steel tooth ridge 1 with the first combination beam 4, and simultaneously facilitates the bolt 3 to connect the second steel tooth ridge 15 with the second combination beam 5.
Further, the temporary counter-pulling unit 13 further comprises an embedded steel pipe 8, the embedded steel pipe 8 is connected to the first reserved hole 10, and the bolt 3 is sleeved in the embedded steel pipe 8. Bolt 3 passes pre-buried steel pipe 8 and will be temporarily to drawing unit 13 vertical and be connected with the composite beam, and interim joint strength between the reinforcing composite beam when making things convenient for bolted connection, avoids the bolt to the destruction of composite beam, interim drawing unit 13 after demolising, take out pre-buried steel pipe 8, use and carry out the shutoff with the concrete of composite beam decking same material to the first preformed hole 10 of composite beam.
Further, the axes of the first preformed hole 10, the embedded steel pipe 8 and the bolt 3 are collinear. The stability of the connection is improved.
The use method of the temporary counter-pulling system for the cable-stayed bridge reinforced concrete composite beam comprises the following steps: after the first combination beam 4 and the second combination beam 5 are hoisted in place, a wet joint 6 of a casting construction site is poured, after the wet joint 6 of the casting construction site reaches a maintenance condition, before a stay cable 14 of a beam section is installed and tensioned, the first steel tooth ridge 1 is connected with the first combination beam 4 through the bolt 3, the second steel tooth ridge 15 is connected with the second combination beam 5 through the bolt 3, the first steel tooth ridge 1 and the second steel tooth ridge 15 are oppositely pulled along the bridge direction between adjacent beam sections through the temporary pull rod 2, the temporary pull rod 2 is tensioned to a design value, the temporary pull rod beam section is solidified through the nut 9, and the temporary connection of the combination beam is completed.
The device ensures that the temporary connection between the combined beams (the first combined beam 4 and the second combined beam 5) is safe, effective and controllable in acting force, and has the characteristics of simple structure, simplicity and convenience in operation, strong connectivity, controllable connecting force or connecting degree and recycling.
In the description of the present invention, it is to be understood that the terms "front" and "rear" and the like, if any, are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used for illustrative purposes only and are not to be construed as limiting the present invention.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the utility model, which is intended to be covered by the claims and any design similar or equivalent to the scope of the utility model.
Claims (10)
1. The utility model provides a cable-stay bridge steel reinforced concrete composite beam is system of drawing to interim, includes composite beam one (4) and composite beam two (5), and adjacent setting around composite beam one (4) and composite beam two (5), its characterized in that: the combined beam I (4) and the combined beam II (5) are connected through the temporary counter-pulling unit (13); the temporary counter-pulling unit (13) comprises a first steel tooth sill (1), a temporary pull rod (2), a bolt (3) and a second steel tooth sill (15), the bottom of the first steel tooth sill (1) is connected with a first combined beam (4) through the bolt (3), the second steel tooth sill (15) is connected with a second combined beam (5) through the bolt (3), and the first steel tooth sill (1) is connected with the second steel tooth sill (15) through the temporary pull rod (2).
2. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam according to claim 1, characterized in that: the first steel tooth ridge (1) and the second steel tooth ridge (15) are symmetrically distributed along a longitudinal axis between the first combined beam (4) and the second combined beam (5).
3. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam according to claim 1, characterized in that: the number of the temporary counter-pulling units (13) is more than 2.
4. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam according to claim 1, characterized in that: the first steel tooth sill (1) and the second steel tooth sill (15) are both box-shaped structures.
5. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam as claimed in claim 4, wherein: the box structure includes front bezel (12), back plate (7), bottom plate (16), roof (17), left plate (19) and right board (20), front bezel (12) and back plate (7) are from preceding back parallel connection between bottom plate (16) and roof (17), the left end of front bezel (12) and the left end of back plate (7) are passed through left board (19) and are connected, the right-hand member of front bezel (12) and the right-hand member of back plate (7) are passed through right board (20) and are connected, second preformed hole (11) have all been seted up on the relative position of front bezel (12) and back plate (7), second preformed hole (11) of first steel tooth bank (1) are passed to the one end of interim pull rod (2), second preformed hole (11) of second steel tooth bank (15) are passed to the other end.
6. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam as claimed in claim 5, wherein: the temporary pull rod is characterized by further comprising a nut (9), one end of the temporary pull rod (2) is fixedly connected with the first steel tooth sill (1) through the nut (9), and the other end of the temporary pull rod (2) is fixedly connected with the second steel tooth sill (15) through the nut (9).
7. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam according to claim 1, characterized in that: the number of the temporary pull rods (2) is multiple.
8. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam according to claim 1, characterized in that: first preformed holes (10) are formed in the first combined beam (4) and the second combined beam (5), the bottom of the first steel tooth sill (1) is connected with the first preformed holes (10) of the first combined beam (4) through bolts (3), and the second steel tooth sill (15) is connected with the first preformed holes (10) of the second combined beam (5) through bolts (3).
9. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam as claimed in claim 8, wherein: the temporary counter-pulling unit (13) further comprises an embedded steel pipe (8), the embedded steel pipe (8) is connected to the first reserved hole (10), and the bolt (3) is sleeved in the embedded steel pipe (8).
10. The temporary opposite-pulling system for the cable-stayed bridge steel-concrete composite beam according to claim 9, characterized in that: the first preformed hole (10), the embedded steel pipe (8) and the bolt (3) are collinear in axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121262424.7U CN215925600U (en) | 2021-06-07 | 2021-06-07 | Temporary counter-pulling system for cable-stayed bridge reinforced concrete composite beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121262424.7U CN215925600U (en) | 2021-06-07 | 2021-06-07 | Temporary counter-pulling system for cable-stayed bridge reinforced concrete composite beam |
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| Publication Number | Publication Date |
|---|---|
| CN215925600U true CN215925600U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121262424.7U Active CN215925600U (en) | 2021-06-07 | 2021-06-07 | Temporary counter-pulling system for cable-stayed bridge reinforced concrete composite beam |
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| CN (1) | CN215925600U (en) |
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2021
- 2021-06-07 CN CN202121262424.7U patent/CN215925600U/en active Active
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